We use a cloud-based email provider, SendGrid, to ensure all emails sent from your channel partner portal get delivered properly and there's generally no need to use a custom SMTP server. However, certain customers may want to use their own SMTP server, which we support. Here's how:
Step 1: Go to Settings > Email > Email Settings
Select "Send mail through my own SMTP server" and then click the "Configure SMTP server" link:
Step 2: Enter your SMTP server details
Enter your SMTP server domain, port, username and password and hit the Test button.